The LM2596SX-3.3 from TI is a 3A SIMPLE SWITCHER step-down regulator with 3.3V fixed output and 150kHz switching in a TO-263-5 package for efficient 3.3V power supply conversion.<\/p>\n
| Paquete<\/td>\n | TO-263-5<\/td>\n<\/tr>\n<\/table>\nCaracter\u00edsticas<\/h2>\nAplicaciones<\/h2>\nProduct Overview The LM2596SX-3.3 from TI is a 3A SIMPLE SWITCHER step-down regulator with 3.3V fixed output and 150kHz switching in a TO-263-5 package for efficient 3.3V power supply conversion. Key Specifications Package TO-263-5 Features See datasheet for complete specifications Industry-standard package Applications Industrial control Consumer electronics Communication equipment Automotive electronics<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[31,13],"tags":[],"chip_brand":[138],"class_list":["post-5589","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"3A SIMPLE SWITCHER buck, 3.3V fixed, 150kHz, TO-263","date_code":"","package_case":"TO-263-5","in_stock":6333,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm2596.pdf","price":"$1.80 @ 1ku","product_introduction":"The LM2596SX-3.3 from TI is a 3A SIMPLE SWITCHER step-down regulator with 3.3V fixed output and 150kHz switching in a TO-263-5 package for efficient 3.3V power supply conversion.","working_principle":"The LM2596SX-3.3 is a 3A step-down (buck) switching regulator from Texas Instruments in TO-263 (D2PAK), providing a fixed 3.3V output from 4.5-40V input at 150kHz fixed frequency. The SIMPLE SWITCHER family is designed for minimal external components: one inductor (68uH), one Schottky diode (5A\/40V like 1N5824), input capacitor (680uF electrolytic), and output capacitor (220uF electrolytic). The internal architecture uses current-mode control: an error amplifier compares the FB voltage with the 1.23V internal reference (through an internal resistor divider for the fixed-voltage version); the error amplifier output controls the peak inductor current; the 150kHz oscillator sets the maximum duty cycle (approximately 90%). The switch is a 3A NPN Darlington with 1.5V saturation voltage at 3A (higher than MOSFET-based converters, reducing efficiency). The typical efficiency is 80% at 12V input and 3A load. The switch current limit is 4.5A (peak) for startup inrush and transient loads. The ON\/OFF pin provides logic-level shutdown: pulling HIGH (above 1.3V) turns off the switch and reduces supply current to 50uA. The device has thermal shutdown at 165C and overcurrent protection with hiccup mode. The TO-263 package provides 2C\/W junction-to-tab thermal resistance, allowing 3W dissipation on a 2oz copper pour. The -SX-3.3 suffix specifies TO-263, 3.3V fixed output. The LM2596 is one of the most popular buck regulators in the industry, used in automotive, industrial, and consumer applications.","pin_description":"
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